package weaver.interfaces.htsc.util;

import org.apache.http.HttpEntity;
import org.apache.http.ParseException;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import weaver.general.BaseBean;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;

public class HttpRequestUtil extends BaseBean{


	/**
	 * 模拟请求
	 *
	 * @param url        资源地址
	 * @param params    参数列表
	 * @param encoding    编码
	 * @return
	 * @throws ParseException
	 * @throws IOException
	 */
	public String sendPost(String url, String params,String encoding){
		String body = "";

		//创建httpclient对象
		CloseableHttpClient client = HttpClients.createDefault();
		//创建post方式请求对象
		HttpPost httpPost = new HttpPost(url);

		//设置参数到请求对象中
		StringEntity strEntity = null;//解决中文乱码问题
		try {
			strEntity = new StringEntity(params,encoding);
		} catch (Exception e) {
			e.printStackTrace();
		}
		strEntity.setContentEncoding(encoding);
		strEntity.setContentType("application/json");
		httpPost.setEntity(strEntity);

		//设置header信息
		//指定报文头【Content-type】、【User-Agent】
		httpPost.setHeader("Content-type", "application/json");
		httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");

		//执行请求操作，并拿到结果（同步阻塞）
		CloseableHttpResponse response = null;
		try {
			response = client.execute(httpPost);
			//获取结果实体
			HttpEntity entity = response.getEntity();
			if (entity != null) {
				//按指定编码转换结果实体为String类型
				body = EntityUtils.toString(entity, encoding);
			}
			//EntityUtils.consume(entity);
			//释放链接
			response.close();
		} catch (IOException e) {
			e.printStackTrace();
		}

		return body;
	}
	
	
	/**
     * 向指定URL发送GET方法的请求
     * 
     * @param url
     *            发送请求的URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return result 所代表远程资源的响应结果
     */
    public String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString); // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection(); // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 建立实际的连接
            connection.connect();
            // 获取所有响应头字段
            //Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            //for (String key : map.keySet()) {
            //    System.out.println(key + "--->" + map.get(key));
            //}
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream(),"UTF-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        
        return result;
    }
	
    
    public static void main(String[] args) {

	}
	
	
}
